package com.fa.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.fa.reggie.common.BaseContext;
import com.fa.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/*
* 检查用户是否已经完成登录
* */
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
    //路径匹配器,支持通配符
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //1.获取本次请求的URI
        String requestURI = request.getRequestURI();

        log.info("拦截到请求: {}",requestURI);
        //定义不需要处理的请求路径
        String[] urls = new String[]{
             "/employee/login",
             "/employee/logout",
             "/backend/**",
             "/front/**",
             "/common/**",
                "/user/sendMsg",//移动端发送短信
                "/user/login"//移动端登录
        };

        //2.判断本次请求是否需要处理
        boolean check = check(urls, requestURI);

        //3.如果不需要处理,则直接放行
        if (check){
            log.info("本次请求{}不需要处理",requestURI);
            filterChain.doFilter(request,response);
            return;
        }
        //4-1.判断后台管理端登录状态,如果已登录,则直接放行
        if (request.getSession().getAttribute("employee") != null){
            log.info("用户已登录,用户id为:{}",request.getSession().getAttribute("employee"));

            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);

           /* Long id = Thread.currentThread().getId();
            log.info("线程id为:{}",id);*/

            filterChain.doFilter(request,response);
            return;
        }
        //4-2.判断移动端登录状态,如果已登录,则直接放行
        if (request.getSession().getAttribute("user") != null){
            log.info("用户已登录,用户id为:{}",request.getSession().getAttribute("user"));

            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);

           /* Long id = Thread.currentThread().getId();
            log.info("线程id为:{}",id);*/

            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        //5.如果未登录则返回未登录结果,通过输出流方式向客户端页面响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;

       /* log.info("拦截到请求: {}",request.getRequestURI());
        filterChain.doFilter(request,response);*/

    }
/*
* 匹配路径,检查本次请求是否需要放行
* */
    public boolean check(String[] urls,String requestURI){
        for (String url : urls){
            boolean match = PATH_MATCHER.match(url, requestURI);
            if (match){
                return true;
            }
        }
        return false;
    }
}
